Morphogenetic and structural characteristics of andropogon grass submitted to different cutting heights

Detalhes bibliográficos
Autor(a) principal: Sousa, Braulio Maia de Lana
Data de Publicação: 2009
Outros Autores: Nascimento Júnior, Domicio do, Silva, Sila Carneiro da, Monteiro, Hélida Christhine de Freitas, Rodrigues, Carlindo Santos, Fonseca, Dilermando Miranda da, Silveira, Márcia Cristina Teixeira da, Sbrissia, André Fischer
Tipo de documento: Artigo
Idioma: eng
Título da fonte: LOCUS Repositório Institucional da UFV
Texto Completo: http://dx.doi.org/10.1590/S1516-35982010001000006
http://www.locus.ufv.br/handle/123456789/15280
Resumo: This work was performed aiming to evaluate the morphogenetic and structural characteristics of Andropogon gayanus cv. Planaltina species submitted to three cutting heights (20, 27 and 34 cm). The three cutting heights were allocated in experimental units (12 m2) in a complete randomized block design with three replications. The cuts were done when the light interception by the sward reached 95%. At this moment, the sward height revealed itself constant with values close to 50 cm. The lowest cutting height (20 cm) influenced negatively the final leaf blade length, the number of live leaves, the leaf lifespan, the stem elongation rate and the tiller population density, and it influenced positively the phyllochron and the leaf senescence rate. Probably, cuts at 20 cm height caused a high decapitation and death of the tillers. The worst growth conditions in addition to the blossom of this specie occurred during fall resulted in higher stem elongation rates and number of live leaves, and lower phyllochron, final leaf blade length, and leaf lifespan. The sward height can be used as a practical and efficient criterion in the management of andropogon grass. Under intermittent management conditions, the regrowth of andropogon grass must be interrupted when the sward reaches 50 cm height, and the defoliation must be interrupted when the stubble height is close to 27 cm.
id UFV_783e19922edc14cd7b1fbc97e397a5ff
oai_identifier_str oai:locus.ufv.br:123456789/15280
network_acronym_str UFV
network_name_str LOCUS Repositório Institucional da UFV
repository_id_str 2145
spelling Morphogenetic and structural characteristics of andropogon grass submitted to different cutting heightsAndropogon gayanusEcophysiologyLight interceptionMorphogenesisSward heightThis work was performed aiming to evaluate the morphogenetic and structural characteristics of Andropogon gayanus cv. Planaltina species submitted to three cutting heights (20, 27 and 34 cm). The three cutting heights were allocated in experimental units (12 m2) in a complete randomized block design with three replications. The cuts were done when the light interception by the sward reached 95%. At this moment, the sward height revealed itself constant with values close to 50 cm. The lowest cutting height (20 cm) influenced negatively the final leaf blade length, the number of live leaves, the leaf lifespan, the stem elongation rate and the tiller population density, and it influenced positively the phyllochron and the leaf senescence rate. Probably, cuts at 20 cm height caused a high decapitation and death of the tillers. The worst growth conditions in addition to the blossom of this specie occurred during fall resulted in higher stem elongation rates and number of live leaves, and lower phyllochron, final leaf blade length, and leaf lifespan. The sward height can be used as a practical and efficient criterion in the management of andropogon grass. Under intermittent management conditions, the regrowth of andropogon grass must be interrupted when the sward reaches 50 cm height, and the defoliation must be interrupted when the stubble height is close to 27 cm.Este trabalho foi realizado com o objetivo de avaliar as características morfogênicas e estruturais da espécie Andropogon gayanus cv. Planaltina, submetida a três alturas de corte (20, 27 e 34 cm). As três alturas de corte foram alocadas às unidades experimentais (12 m2) em delineamento de blocos completos casualizados com três repetições. Os cortes foram realizados quando a interceptação luminosa pelo dossel atingiu 95%. A altura do dossel nesse momento mostrou-se constante, com valores próximos a 50 cm. A menor altura de corte (20 cm) influenciou negativamente o comprimento final da lâmina foliar, o número de folhas vivas, a duração de vida da folha, a taxa de alongamento de colmo e a densidade populacional de perfilhos, e positivamente o filocrono e a taxa de senescência de folhas. Provavelmente, cortes a 20 cm de altura causaram elevada decapitação e morte de perfilhos. As piores condições de crescimento junto do florescimento ocorrido durante o outono resultaram em maiores taxas de alongamento de colmos e número de folhas vivas e em menor filocrono, comprimento final da lâmina foliar e duração de vida da folha. A altura do dossel pode ser utilizada como critério prático e eficiente de manejo do capim-andropógon. Em condições de manejo intermitente, a rebrotação deve ser interrompida quando o dossel atingir 50 cm de altura, e a desfolhação, quando a altura de resíduo ficar próxima de 27 cm.Revista Brasileira de Zootecnia2017-12-15T14:18:50Z2017-12-15T14:18:50Z2009-12-30info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlepdfapplication/pdf1806-9290http://dx.doi.org/10.1590/S1516-35982010001000006http://www.locus.ufv.br/handle/123456789/15280engv. 39, n. 10, p. 2141-2147, Oct. 2010Sousa, Braulio Maia de LanaNascimento Júnior, Domicio doSilva, Sila Carneiro daMonteiro, Hélida Christhine de FreitasRodrigues, Carlindo SantosFonseca, Dilermando Miranda daSilveira, Márcia Cristina Teixeira daSbrissia, André Fischerinfo:eu-repo/semantics/openAccessreponame:LOCUS Repositório Institucional da UFVinstname:Universidade Federal de Viçosa (UFV)instacron:UFV2024-07-12T08:35:29Zoai:locus.ufv.br:123456789/15280Repositório InstitucionalPUBhttps://www.locus.ufv.br/oai/requestfabiojreis@ufv.bropendoar:21452024-07-12T08:35:29LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV)false
dc.title.none.fl_str_mv Morphogenetic and structural characteristics of andropogon grass submitted to different cutting heights
title Morphogenetic and structural characteristics of andropogon grass submitted to different cutting heights
spellingShingle Morphogenetic and structural characteristics of andropogon grass submitted to different cutting heights
Sousa, Braulio Maia de Lana
Andropogon gayanus
Ecophysiology
Light interception
Morphogenesis
Sward height
title_short Morphogenetic and structural characteristics of andropogon grass submitted to different cutting heights
title_full Morphogenetic and structural characteristics of andropogon grass submitted to different cutting heights
title_fullStr Morphogenetic and structural characteristics of andropogon grass submitted to different cutting heights
title_full_unstemmed Morphogenetic and structural characteristics of andropogon grass submitted to different cutting heights
title_sort Morphogenetic and structural characteristics of andropogon grass submitted to different cutting heights
author Sousa, Braulio Maia de Lana
author_facet Sousa, Braulio Maia de Lana
Nascimento Júnior, Domicio do
Silva, Sila Carneiro da
Monteiro, Hélida Christhine de Freitas
Rodrigues, Carlindo Santos
Fonseca, Dilermando Miranda da
Silveira, Márcia Cristina Teixeira da
Sbrissia, André Fischer
author_role author
author2 Nascimento Júnior, Domicio do
Silva, Sila Carneiro da
Monteiro, Hélida Christhine de Freitas
Rodrigues, Carlindo Santos
Fonseca, Dilermando Miranda da
Silveira, Márcia Cristina Teixeira da
Sbrissia, André Fischer
author2_role author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Sousa, Braulio Maia de Lana
Nascimento Júnior, Domicio do
Silva, Sila Carneiro da
Monteiro, Hélida Christhine de Freitas
Rodrigues, Carlindo Santos
Fonseca, Dilermando Miranda da
Silveira, Márcia Cristina Teixeira da
Sbrissia, André Fischer
dc.subject.por.fl_str_mv Andropogon gayanus
Ecophysiology
Light interception
Morphogenesis
Sward height
topic Andropogon gayanus
Ecophysiology
Light interception
Morphogenesis
Sward height
description This work was performed aiming to evaluate the morphogenetic and structural characteristics of Andropogon gayanus cv. Planaltina species submitted to three cutting heights (20, 27 and 34 cm). The three cutting heights were allocated in experimental units (12 m2) in a complete randomized block design with three replications. The cuts were done when the light interception by the sward reached 95%. At this moment, the sward height revealed itself constant with values close to 50 cm. The lowest cutting height (20 cm) influenced negatively the final leaf blade length, the number of live leaves, the leaf lifespan, the stem elongation rate and the tiller population density, and it influenced positively the phyllochron and the leaf senescence rate. Probably, cuts at 20 cm height caused a high decapitation and death of the tillers. The worst growth conditions in addition to the blossom of this specie occurred during fall resulted in higher stem elongation rates and number of live leaves, and lower phyllochron, final leaf blade length, and leaf lifespan. The sward height can be used as a practical and efficient criterion in the management of andropogon grass. Under intermittent management conditions, the regrowth of andropogon grass must be interrupted when the sward reaches 50 cm height, and the defoliation must be interrupted when the stubble height is close to 27 cm.
publishDate 2009
dc.date.none.fl_str_mv 2009-12-30
2017-12-15T14:18:50Z
2017-12-15T14:18:50Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv 1806-9290
http://dx.doi.org/10.1590/S1516-35982010001000006
http://www.locus.ufv.br/handle/123456789/15280
identifier_str_mv 1806-9290
url http://dx.doi.org/10.1590/S1516-35982010001000006
http://www.locus.ufv.br/handle/123456789/15280
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv v. 39, n. 10, p. 2141-2147, Oct. 2010
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv pdf
application/pdf
dc.publisher.none.fl_str_mv Revista Brasileira de Zootecnia
publisher.none.fl_str_mv Revista Brasileira de Zootecnia
dc.source.none.fl_str_mv reponame:LOCUS Repositório Institucional da UFV
instname:Universidade Federal de Viçosa (UFV)
instacron:UFV
instname_str Universidade Federal de Viçosa (UFV)
instacron_str UFV
institution UFV
reponame_str LOCUS Repositório Institucional da UFV
collection LOCUS Repositório Institucional da UFV
repository.name.fl_str_mv LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV)
repository.mail.fl_str_mv fabiojreis@ufv.br
_version_ 1817560027332870144